To the right showing various wings is an example of what type of structure?
Analogous structures (different structures, similar functions)
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15
In Madagascar scientists have discovered a moth, Xanthopan morganii praedicta, that has a 30.5 cm proboscis and feeds from and pollinates Darwinโs orchid, Angraecum sesquipedale. The orchid has a nectar-producing tube that is 27.9 cm long.
The moth has little competition for food
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15
GENE FLOW
The random movement of individual organisms between two populations of a species. They are able to bring their unique combination of traits to the new populatio
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15
What will happen to species when their environment suddenly changes due to natural disaster? How will that be reflected in the fossil layer (hint: think about the dinosaurs
A very small number of them will survive or the entire species will die off. There will be a distinct part of the fossil layer that has them, then they will dis
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15
Some adaptations can include camouflage and mimicry. State how each help an organisms survive below: Camouflage
the ability of an organism to blend in with its environment. This helps the organism hide from potential predators (so they donโt get eaten) and prey (so they
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15
Describe natural selection AND describe an example of natural selection
Natural selection is a process that occurs when: A population experiences overproduction of offspring. The members of the population have genetic variation. So
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NATURAL SELECTION
The gradual (slow) change in a populationโs characteristics over time, due to environmental pressures. Does this process increase or decrease genetic variatio
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MUTATION
A change in DNA to produce a new trait. Ex: blue eyes are a mutation from the original brown eyes. Does this process increase or decrease genetic variation? I
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15
What adaptation seems to increase the fitness of the cacti on the right? How do you think this adaptation increases the ability of cacti on the right to survive and reproduce?
Having spines. This will increase its fitness because animals will not want to eat it, so it will survive and reproduce.
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15
Some adaptations can include camouflage and mimicry. State how each help an organisms survive below: Mimicry
the ability of an organism/species to look like a member of a different, usually poisonous species. This protects them from predators, who donโt want to eat som
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15
Which layer is the youngest?
R
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15
Which layer is the oldest?
I
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Fossils
Fossil organisms found in bottom (older) layers are more primitive than those in the upper (newer) layers; often times, these extinct fossils resembled modern l